“Nothing to write home about”in other languages

Same idea, different pictures

English probably comes from letters home, where only real news was worth the ink. French has two: ce n'est pas le Pérou, it's not Peru, once a byword for fabulous treasure, and ça ne casse pas trois pattes à un canard, it doesn't break three legs of a duck, which only has two.

German says it's not the yellow of the egg, nicht das Gelbe vom Ei, the yolk being the best part. Dutch says there's not much soup in it, niet veel soeps.